Remove the sender_id from the Push API code path.

content/shell/renderer/test_runner/mock_web_push_client.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_WEB_PUSH_CLIENT_H_
 #define CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_WEB_PUSH_CLIENT_H_
 
 #include <string>
 
 #include "third_party/WebKit/public/platform/WebPushClient.h"
@@ skipping 19 matching lines @@
 
   void SetMockSuccessValues(const std::string& end_point,
                             const std::string& registration_id);
 
   void SetMockErrorValues(const std::string& message);
 
  private:
   // WebPushClient implementation.
   virtual void registerPushMessaging(
       const blink::WebString& sender_id,
-      blink::WebPushRegistrationCallbacks* callbacks);
-  virtual void registerPushMessaging(
-      const blink::WebString& sender_id,
       blink::WebPushRegistrationCallbacks* callbacks,
       blink::WebServiceWorkerProvider* service_worker_provider);
+  virtual void registerPushMessaging(
+      blink::WebPushRegistrationCallbacks* callbacks,
+      blink::WebServiceWorkerProvider* service_worker_provider);
 
   std::string end_point_;
   std::string registration_id_;
   std::string error_message_;
 
   DISALLOW_COPY_AND_ASSIGN(MockWebPushClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_WEB_PUSH_CLIENT_H_